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Old 08-02-2009, 02:43 PM   #1
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mini split Wiring question???


Hello,
i bought a mini split system and the wiring between the indoor and the outdoor units confuses me. I was going to have a 30A disconnect between the service panel and the outdoor unit. According to the wiring diagram, i need another 20A disconnect between the Indoor and the Outdoor units along a 5A breaker / or a fuse between leads S1 & S2. can someone explain this to me. Thanks!!!
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Old 08-02-2009, 03:06 PM   #2
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mini split Wiring question???


I believe some jurisdictions require a disconnect for this line because it feeds line voltage back into the house for the fan motor. Ask your inspector if you need the disconnect. Are you in the UK?

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Old 08-02-2009, 04:28 PM   #3
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mini split Wiring question???


No! I am in Texas.
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Old 08-02-2009, 04:54 PM   #4
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mini split Wiring question???


What is the model number?
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Old 08-02-2009, 06:06 PM   #5
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mini split Wiring question???


it is a 2.5 ton cooling Fujitsu unit. ASU30/36CLX. i know how to read the diagram, but doesn't know what it translate to hardware wise or is it necessary. i know it is essential for a regular central system. on this, all the literature connects straight from outdoor to indoor with fuse or a disconnect
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Old 08-02-2009, 06:31 PM   #6
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mini split Wiring question???


Again, this can only be answered by your inspector. I just had a quad zone Mitsu system installed ,and the company did not use disconnects between the outdoor and indoor units. I just ran a 30A fused disconnect(w/ 20A time delay fuses) for the outdoor unit and that's all.

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